drm/radeon/kms: Add initial support for async DMA on r6xx/r7xx
Uses the new multi-ring infrastucture. 6xx/7xx has a single
async DMA ring.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 8c42d54..461bf53 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -109,7 +109,7 @@
#define RADEON_BIOS_NUM_SCRATCH 8
/* max number of rings */
-#define RADEON_NUM_RINGS 3
+#define RADEON_NUM_RINGS 4
/* fence seq are set to this number when signaled */
#define RADEON_FENCE_SIGNALED_SEQ 0LL
@@ -122,6 +122,9 @@
#define CAYMAN_RING_TYPE_CP1_INDEX 1
#define CAYMAN_RING_TYPE_CP2_INDEX 2
+/* R600+ has an async dma ring */
+#define R600_RING_TYPE_DMA_INDEX 3
+
/* hardcode those limit for now */
#define RADEON_VA_IB_OFFSET (1 << 20)
#define RADEON_VA_RESERVED_SIZE (8 << 20)
@@ -787,6 +790,11 @@
void radeon_ring_fini(struct radeon_device *rdev, struct radeon_ring *cp);
+/* r600 async dma */
+void r600_dma_stop(struct radeon_device *rdev);
+int r600_dma_resume(struct radeon_device *rdev);
+void r600_dma_fini(struct radeon_device *rdev);
+
/*
* CS.
*/
@@ -883,6 +891,7 @@
#define RADEON_WB_CP_RPTR_OFFSET 1024
#define RADEON_WB_CP1_RPTR_OFFSET 1280
#define RADEON_WB_CP2_RPTR_OFFSET 1536
+#define R600_WB_DMA_RPTR_OFFSET 1792
#define R600_WB_IH_WPTR_OFFSET 2048
#define R600_WB_EVENT_OFFSET 3072